Somphob Leetachewa. (1994) Biological activity effects of Pluchea indica less. and Wedelia biflora D.C. extracts against Plutella xylostella Linn. (Yponomeutidae : Lepidoptera). Mahidol University,:ม.ป.ท.Somphob Leetachewa. 1994. Biological activity effects of Pluchea indica less. and Wedelia biflora D.C. extracts against Plutella xylostella Linn. (Yponomeutidae : Lepidoptera). ม.ป.ท.:Mahidol University,;Somphob Leetachewa. Biological activity effects of Pluchea indica less. and Wedelia biflora D.C. extracts against Plutella xylostella Linn. (Yponomeutidae : Lepidoptera). ม.ป.ท.:Mahidol University, 1994. Print.